1. Cluster Active Archive
System Infrastructure
ESTEC
31st May – 1st June 2005
CAA review

2. Design considerations
Operating system
Hardware scalability
Software compatibility
3rd party products like IDL, rdbms etc.
software already written for instrument data. effort in porting/reimplementation.
Cost
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5. Server hardware considerations
License costs
Processor type
Memory – how big, single/dual channel
Local storage – ide,sata1,u160,u320
Onboard or add-on h/w for local IO
Networking h/w add-on requirements
Room for further expansion on motherboard
CAA review

6. Final server configuration
Component
Description
Processors
Intel XEON 3.0GHz * 2
SCSI
Onboard dual channel Ultra320 scsi,
Intel i960rs Ultra160 pci scsi controller
Local storage
2* 36GB Ultra320 raid1
Video
ATI rage XL 8MB PCI
Peripheral slots
64bit 100MHz * 2, 64bit 66MHz * 4
USB 2
Network interface
Onboard gigabit Ethernet * 2,
Intel PRO/1000mt gigabit dual port adapter
CD/DVD
NEC ND-2500
Power
Internal redundant 400 watt
CAA review

7. Server components
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8. Network Interfaces
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9. Storage considerations
Cost
IO performance
Capacity and growth
Server load
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10. Storage options direct attached (DAS) network attached (NAS)
advantages: lowest cost, easiest to implement and support
disadvantages: difficult to expand, difficult sharing and failover
network attached (NAS)
advantages: can be shared by different operating systems
disadvantages: slower than SAN (more software intensive), limited by ethernet bandwidth
storage area network (SAN)
Advantages: speed, expandability, separate FC based connectivity
Disadvantages: cost
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12. SAN options
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13. Backup
Expansion – any hardware solution must have the ability to increase it’s capacity along with the storage without requiring replacement.
Transfer rates – this has to be sufficiently high to recover large amounts of data within a reasonable time
Strategy - none
Disaster recovery plan – in progress but not yet finalized
CAA review

14. Connectivity
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